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@INPROCEEDINGS{Brinkmann:907680,
      author       = {Brinkmann, Jan-Paul and Ehteshami-Flammer, Niloofar and
                      Luo, Mingzeng and Leißing, Marco and Röser, Stephan and
                      Nowak, Sascha and Yang, Yong and Winter, Martin and Li, Jie},
      title        = {{I}nteractions of cation disordered rocksalt cathodes with
                      various electrolytes},
      reportid     = {FZJ-2022-02153},
      year         = {2022},
      abstract     = {Despite them missing a layered structure, cation disordered
                      rocksalt (DRX) cathode materials have risen in research
                      interest in the last couple of years, not only because of
                      their high specific capacity but also for the possibility to
                      lift the limitation on specific transition metals like Ni,
                      Co and Mn.(1-3) Many of them involve the combination of a
                      redox inactive d0 stabilizing element like Nb.(4, 5) The
                      utilization of anionic redox reaction in this material class
                      is believed to be the cause of the materials poor
                      electrochemical performance, while possible other factors
                      like unfavourable side reactions with commonly used
                      carbonate-based electrolytes or other cell components are
                      less investigated.(6, 7)In order to address this fact, the
                      electrochemical performance as well as the formation of the
                      cathode electrolyte interphase (CEI) of a
                      Li1.25Fe0.5Nb0.25O2 DRX cathode was investigated in Lithium
                      metal and Lithium ion cells. Thereby, the use of a
                      carbonate-based electrolyte and an ionic liquid-based
                      electrolyte were compared. Severe side reactions occur
                      between the cathode material and the carbonate-based
                      electrolyte which leads to a strong capacity fading and poor
                      Coulombic efficiency. An ongoing decomposition of
                      electrolyte components on the cathode materials surface
                      during charge and discharge cycling covers the material with
                      degradation products like Li2CO3 and LiF which causes
                      resistance growth and is accompanied by dangerous gassing in
                      the cells. On the other hand, the ionic liquid electrolyte
                      shows only negligible degradation and can promote capacity
                      retention.(8)The mismatch of carbonate based electrolytes
                      with the Li1.25Fe0.5Nb0.25O2 cathode shown here can be
                      applied to other DRX materials which opens new approaches
                      for improvements in their performance.(8)References},
      month         = {Mar},
      date          = {2022-03-28},
      organization  = {Batterietagung, Münster (Germany), 28
                       Mar 2022 - 30 Mar 2022},
      subtyp        = {After Call},
      cin          = {IEK-12},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/907680},
}